ASIN B00PKS6MT0Image via Amazon
AllergyZone FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green
- Protect Your Hvac System
- Improve Air Quality
- Energy Efficient
- Easy to Install
$12.99
Price as of Oct 16, 2026, 7:48 AM UTC. Prices and availability are subject to change. The price shown on Amazon at the time of purchase applies.
- Checkout happens securely on Amazon
- Read verified customer reviews first
- Shortlisted by Everstead Finds
Disclosure: this page contains affiliate links. As an Amazon Associate, I earn from qualifying purchases, at no extra cost to you.
Key features
Protect Your Hvac System
FilterLock is a patented two-piece magnetic seal system designed for furnace systems with 1” air filters, eliminating air leakage at the filter slot/door to enhance indoor air quality and reduce energy consumption.
Improve Air Quality
Prevent harmful airborne contaminants such as allergens, dust, and gases like carbon monoxide from entering your HVAC system. Properly sealing the filter slot/door ensures that pollutants don’t bypass the air filter.
Energy Efficient
Reduce utility bills and save energy by effectively stopping air leaks in your HVAC system. This not only enhances overall indoor air quality but also addresses one of the four major ductwork issues identified by Energy Star—air leakage at the filter slot.
Easy to Install
Enjoy hassle-free installation with FilterLock’s universal, one-size-fits-all seal that magnetically attaches to ductwork to cover the furnace filter slot door. This convenient two-piece design is compatible with any 1” furnace filter up to 25” long.
Additional Features
Benefit from a reusable, easy on/easy off magnetic design that ensures long-term use. Once both pieces are installed, the seal measures approximately 25 x 4.8 x 0.1 inches, providing a perfect fit for your needs.
AllergyZone FilterLock Furnace Filter Slot Seal – Magnetic Seal Cover for Any 1” Furnace Filter, Up To 25” Long, Reduce HVAC Air Leaks, Green
See the latest price, customer reviews and delivery options on Amazon.
